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aiopg

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aiopg is a library for accessing a PostgreSQL_ database from the asyncio_ (PEP-3156/tulip) framework. It wraps asynchronous features of the Psycopg database driver.

Example

.. code:: python

import asyncio
import aiopg

dsn = 'dbname=aiopg user=aiopg password=passwd host=127.0.0.1'

async def go():
    pool = await aiopg.create_pool(dsn)
    async with pool.acquire() as conn:
        async with conn.cursor() as cur:
            await cur.execute("SELECT 1")
            ret = []
            async for row in cur:
                ret.append(row)
            assert ret == [(1,)]

loop = asyncio.get_event_loop()
loop.run_until_complete(go())

Example of SQLAlchemy optional integration

.. code:: python

import asyncio from aiopg.sa import create_engine import sqlalchemy as sa

metadata = sa.MetaData()

tbl = sa.Table('tbl', metadata, sa.Column('id', sa.Integer, primary_key=True), sa.Column('val', sa.String(255)))

async def create_table(engine): async with engine.acquire() as conn: await conn.execute('DROP TABLE IF EXISTS tbl') await conn.execute('''CREATE TABLE tbl ( id serial PRIMARY KEY, val varchar(255))''')

async def go(): async with create_engine(user='aiopg', database='aiopg', host='127.0.0.1', password='passwd') as engine:

       async with engine.acquire() as conn:
           await conn.execute(tbl.insert().values(val='abc'))

           async for row in conn.execute(tbl.select()):
               print(row.id, row.val)

loop = asyncio.get_event_loop() loop.run_until_complete(go())

.. _PostgreSQL: http://www.postgresql.org/ .. _asyncio: http://docs.python.org/3.4/library/asyncio.html

Please use::

$ make test

for executing the project's unittests. See https://aiopg.readthedocs.io/en/stable/contributing.html for details on how to set up your environment to run the tests.


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python (54,447
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